Complete educational visual material "Collection of minerals" (part 3) for high school and college students and teachers. Cardboard box, plastic trays for mineral samples. Each piece has a glued number according to the "Content" with names printed on the back side of a box cover. 10 specimen. Russian language.

Content

Raw materials for various industries

 23. quartz

24. feldspar

25. mica (muscovite)

26. chalk

27. a***s

28. fluorspar / fluorite

29. kaoline

30. graphite

31. corundum

32. perlite

DATE:
1980, USSR

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